Compilare: main.cpp: In function 'int main()': main.cpp:16:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | while(cont2 < b.size() && cont1 < a.size()) | ~~~~~~^~~~~~~~~~ main.cpp:16:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | while(cont2 < b.size() && cont1 < a.size()) | ~~~~~~^~~~~~~~~~